Burner.



P. D. JOHNSON.

BURNER.

APPLICATION FILED 0501a. 1916.

Patented Apr. 8, 1919.

4 SHEET$-SHEET I P. D. JOHNSON.

BURNER.

APPLICATION FILED 0:0. 18. ms.

Patented Apr. 8, 1919.

4 SHEETS-SHEET 2.

P. D. JOHNSON.

BURNER,

APPLICATION FILED DEC 18. 19l6- Patented Apr. 8, 1919.

4 SHEETS-SHEET 3.

P. D. JOHNSON.

BURNER.

APPLICATION FILED DEC. 19. I916.

I 1 ,300, 1 71 Patented A pr. 8, 1919.

4- SHEETS-SHEET 4- UNITED STATES PATENT OFFICE.

PHILIP D. JOHNSON, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO CHARLES A. BROWN, 0]? HINSDALE, ILLINOIS.

BURNER.

Specification of Letters Patent.

Patented Apr. 8, 1919.

Application filed December 18, 1916. Serial N 0. 137,492.

To al. whom it may concern.-

Be it known that I, PHILIP D. Johnson, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Burners, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification. Y

My invention relates to oil burners.

It is to be understood that certain of the features of this invention are applicable to gas burners and burners for other types of fuel as well.

In burning liquid fuel it is diiiicult to vary the total amount of fire over a large range although such result is highly desirable in the interest of convenience, economy and efficiency.

My invention provides an improved burner construction which makes possible variation of the size of the fire over a wide range under economical and efiicient conditions.

The invention will be better understood by reference to the accompanying specification and drawings in which I have described and illustrated a particular embodiment of the invention. In the drawings Figure 1 is a top plan view of a burner embodying my invention;

Fig. 2 is a left side elevation with parts broken away;

Fig. 3 is a fragmentary section taken on the lines 3, 3 of Fig. 2;

Fig. 1 is a front elevation of the burner shown in Figs. 1 and 2 with a part broken away to reveal the interior;

Fig. 5 is a rear elevation of the same;

Fig. 6 is a front elevation of a modified form of burner which is embodied in a tinners furnace;

Fig. 7 is a transverse cross-section of the same; and

Fig. 8 is a longitudinal cross-section of the central burner showing the arrangement of mixing and distributing tube In the device which I am about to describe I wish to call attention to the two cooperatin for varylng the size of the fire. I provlde first a valve and cooperating means governing the extent or distribution of active burner area, and second a valve and cooperating means for determining the amount of mechanisms which are providedfuel supplied and for properly distributing the same. 7

The device which I have illustrated coniprises essentially oil supplying and vaporizing means, vapor mixing and distributing means and burner screens for burning the mixture. My invention resides in the novel arrangement and cooperation between these various elements and in the organization of certain of the individual elements above named. The burner screen is divided into three sections, the central section 1 and outer symmetrical sections 2 and 3 arranged upon opposite sides of the main burner screen. The main burner screen 1 is formed with a plurality of parallel slots 4 cut transversely on the ridge of an inverted trough-shaped casting 5 the bottom of which is closed by another trough -shaped casting 6, these two parts forming a body of hollow diamond shaped section, the front end of which is connected to and mounted upon the housing 7 which will be described later. The burner 1 is provided with wings 8 and 9 which project into the housing 7 for a purpose later to be described. The two trough-shaped castings 5 and 6 are bolted together at the front end by flanges 10 and 12 upon the upper and lower members respectively and at the rear are bolted together by means of flanges 11 and 13 upon the upper and lower members respectively. At the rear of the burner the hollow casing formed by these two members which I term hereafter the mixing chamber? or casing. is connected to a bracket 14 which is formed as a casting with cored passageways. The casting 14 is provided with a central boss 15 in which is mounted a valve 16, later to be described. The casting 14 also comprises arms 17 and 18 extending from each side at a slight angle to the horizontal. These arms have connected to them tubes 19 and 20 which pass into the hollow mixing chambers 21 and 22 respectively which have the burner screens 2 and 3 in their surfaces respectively. The connecting tubes 19 and 20 communicate through suitable passageways 2627 in the arms 17 and 18 and through the valve 16 with the main mixing chamber at the center. The outer ends of the tubes 19 and 20 are closed off by suitable plugs and within the mixing chambers 21 and 22 these tubes are perforated at their lower side as is well understood in the art.

The castirig 14 is provided with a leg 23 which supports the rear end of the device. A lug 24 formed on the casting 14 provides a support for the rear end of the vaporizer as will be described later. The main mixing chamber formed by the parts 5 and 6 contains a central mixin tube 25 which extends completely throug the main mixing chamber.

The rear end of the mixing tube 25 projects through the rear wall of the mixing chamber and opens into the hollow boss 15. The passageways 26 and 27 which communicate with the mixing tubes 19 and 20, respectively, of the supplemental burner screens communicate with the interior of the hollow boss 15. The valve member-16 is formed of a tubularportion, part of which is cut away, in order to permit the passageways 26 and 27 to be opened simultaneously or to be shut off simultaneously or to be shut of individually. The valve 16 is connected by means of a stem 28 to a handle 29. A suitable stufilng box 30 may be provided for maintaining the valve tight. This stufiing box is closed by a gland 31 which embraces the stem 28 of the valve. A suitable indication may be made upon the hollow boss 15 and upon the handle 29 to indicate when the various burner portions are connected or disconnected.

The main mixing chamber formed of the parts 5 and 6 is supplied with combustible mixture through the openings 33 which are formed in the upper walls of the mixing tube 25. This mixing tube 25 is surrounded by a second mixing tube 34 which has its lower side walls perforated by the openings 35. The rear end of the mixing tube 25 is raised slightly above its front end so that any liquid which may be carried into the mixing tube 25 will tend to flow out at the front end thereof. The bottom walls of the tube 25 are imperforate so that any oil which may be discharged into this mixing tube 25 by the nozzle 36 or otherwise will not enter the burner but will be trapped and will flow out of the front end of this tube. The nozzle 36 is provided with a suitable valve 37 for controlling the rate of fuel vapor discharged into the mixing tube 25.

he nozzle 36 is supplied with 011 vapor from a suitable vaporizer which is supported over the main portion of the burner and is provided with oil through the elbow connection 38 which is connected by suitable piping through a tank containing oil under pressure. he vaporizer comprises an upper va orizing tube 39 and a lower vaporizing to e 40 these tubes being connected together' at their rear end by a connecting block 41 which is provided with suitable cleaning openings closed by the screws 42 and 43. The'screw 43 which is axially in line with the pipe 40 projects through an aperture in the lug 24, as is shown in Fig. 5, and supports the rear end of the vaporizer.

A connecting block 44 supports the upper pipe 39 which passes loosely through this block and is connected to the lower vaporizing pipe 40 and has a passage therein connecting this pipe 40 with the nozzle 36. A suitable cleaning screw 45 closes a cleaning opening in line with the pipe 40. The cross section of the block between the pipe 39 and the connection of the tube 40 may be diminished as by holes to prevent the transfer of heat from the lower portion of the block to the upper portion thereof. The lower portion of the block is provided with shoulders 46 and 47 which project over the wings 8 and 9 of the main burner screen and form means for transferring heat from the burner to this portion of the passage through which the vapor is conducted. Projecting pins 48, shown in dotted line in Fig. 4, also serve to convey heat to this part of the block. The block 44 is provided with a stud 49 which passes through the top of the casing 7 and is fastened by a suitable nut 50 as shown in Fig. 2. The front part of the casing 7 is provided with a sight aperture 51 through which the condition of the fire may be observed. This aperture is normally closed by a flap or door 52 which is hinged upon the front end of the pipe 39. The casing 7 is provided with a pair of supporting legs 53 and 54.

In the embodiment shown in Figs. 6 and 7, the burner has been adapted for use in a tinners furnace. To this end a suitable casing 55 has been provided, this casing having suitable openings 56 and 57 through the front and back thereof in order that soldering irons may be introduced into the furnace as desired. The vaporizer in this form of the invention comprises a pair of pipes 39' and 40 which are connected at the rear by a suitable connecting block 41 this block being turned so as to permit the pipe 39 to lie at a lower position than the pi e 40 and to occupy a position substantla y between the main ortion of the burner and the mixing chain er 21. The front connecting block 44' supports the outer end of the vaporizer pipe 39 and forms a communication between the nozzle 36 and the outer end of the vaporizing pipe 40 in a manner similar to that shown in Figs. 1 to 5, inclusive. Otherwise the structure of this modification is substantially the same as that shown in Figs. 1 to 5, inclusive.

The operation of the structure shown in Fi 1 to 5 is as follows: Oil is introduced an er pressure at 38 and flows into the pipe 39, thence down through the connecting block 41 to the vaporizing pipe. 40, where it is vaporized, and then into the nozzle 36 where the vapor is discharged into the inner mixing tube 25 drawing air in with it to form a combustible mixture. If the supplemental burners are to be operated the valve 16 is suitably set to admit combustible mixture to one or the other or to both of these burners. The combustible mixture passes out of the mixing tube 25 at the rear end thereof for supplying the supplemental burner and the mixture for combustion at the main burner passes out through the openings 33 in the top of the mixing tube 25 and passes into the second mixin tube 34 and thence down through the openings 35 in the bottom of the tube 34. Where only a small fire is desired the valve 37 is operated to reduce the amount of fuel vapor supplied to the mixing tube 25 and the valve 16 at the rear of the burner is set so as to disconnect the supplemental burners 2 and 3. If a greater amount of fire is desired the valve 37 is set or adjusted to admit a greater amount of oil vapor so that the fire will burn high at the main. burner. Forcing of the fire at the main burner does not cause uneven distribution of the burning mixture inasmuch as the two concentric mixing tubes 34 and 25 serve to equalize the pressure throughout the main burner and a uniform and even flame is secured. If a greater amount of flame is desired than can he supplied by the main burner alone one of the supplemental burners is brought into play by means of suitable setting of the valve 16. The amount of fuel mixture supplied to these two burners may be regulated at the valve 37 and when a maximum of fire is desired the other supplemental burner is brought into action.

This arrangement of burners is particularly advantageous for use in the tinners furnace shown in Figs. 6 and 7.

As previously explained the arrangement of the two concentric mixing tubes 25 and 34 is particularly advantageous in that it permits the oil which may be squirted in raw condition into the mixing tube 25 to be caused to flow out of the same because of its inclined position and due to the fact that the lower portion of the tube is imperforated. This has not been possible in burners constructed according to the prior art inasmuch as the lower part of the mixing tube has been perforated and as a result the raw oil would drip through these perforations and be trapped in the bottom of the burner casting or secondary tube, where it would vaporize irregularly.

While I have described my invention with reference to the details of the particular embodiment, it is to be understood that these details except as they appear in the appended claims may be varied within the scope of my invention. The invention does not reside in the dimensions and proportions that I have shown:

I claim:

1. In combination a main burner, a pair of supplementary burners one on each side of said main burner, a mixing tube for said main burner, a bracket for supporting the rear end of said main burner and the rear ends of said supplemental burners, said supporting means having passages therein for connecting said mixing tube with said supplemental burners, and a valve controlling said passages.

2. In combination, a main burner having a mixing chamber, a mixing tube projecting through said chamber, a pair of supplementary burners, means connecting said supplementary burners and said main burner, said means having passageways there through for connecting said supplementary burners with said main burner, and a valve controlling the passage of fuel mixture from said mixing tube to said supplementary burners, said valve being operable to admit fuel mixture to either of said supplementary burners or to both of the same.

3. In combination, a main burner having a relatively long narrow mixing chamber,

a mixing tube extending longitudinally through said mixing chamber, a pair of supplementary burners secured beside said main burner, means for connecting one end of the mixing tube of said main burner with said supplemental burners, valve means for shutting said supplemental burners and means for supplying a variable amount of fuel to the other end of said mixing tube.

4. In combination, a main burner, a supplemental burner, a mixing chamber for said main burner, a mixing tube in said mixing chamber, connecting means for connecting said supplemental burner with the mixing tube in said main burner, a valve for said connecting means, means for supplying fuel to said mixing tube, valve means for governing the amount of fuel so admitted, and means for equalizing the distribution of mixture in said main mixing chamber, said means comprising a tube concentric with said mixing tube, said tube and said mixing tube having perforations in their side walls, said perforations being out of register with each other.

5. In combination, a main burner comprising a relatively long narrow burner casting, a supplemental burner extending parallel to said main burner, a mixing tube in said main burner, connecting means for connecting one end of said mixing tube with said supplemental burner a valve controlling said connecting means, means for supplying fuel to the other end of said mixing tube and valve means governing said fuel supply means.

6. In an oil burner, a burner comprising a mixing chamber, a mixing tube in said chamber, said tube having perforations in 5 an opening in the end thereo whereby the walls thereof, said perforations being in the upper part of the side walls of said tube, the lower side walls of said mixin tube being imperforate, said mixin tube aving accumulations of oil therein will be discharged outside of said burner, and a tube surrounding said mixing tube, said second tube having perforations in the lower side walls thereof.

7. In a burner, a mixing chamber, a mixing tube in said chamber, said tube having openings in the side walls thereof, said openings pointing upward, the lower side walls of said mixing tube being imperforate, said mixing tube having an opening in the end thereof whereby accumulations of oil therein will be discharged outside of said burner, a second tube surrounding said mixing tube, said second tube having perforations in the side walls thereof, said perforations pointing downward and means for discharging a jet of fuel in said mixing tube.

8. In combination a mixing chamber, a mixing tube in said chamber, said tube having perforations in the side walls thereof pointing upward, the lower side walls of said mixing tube being imperforate, the end of said mixing tube being open, whereby accumulations of oil in said mixing tube will be discharged outside of said burner, a tube surrounding said mixing tube, said second tube having perforations in the side 1,soo,171

walls thereof pointing downward and means for supplying oil vapor directly into the end of said mixing tube, said mixing tube being inclined downward toward the open end thereof.

9. In combination a main burner, a pair of supplemental burners, a eonnectin bracket at the rear of said main burner, sai connecting bracket having passa eways therein for connecting said main urner with said supplemental burner, and a valve mounted in said bracket, said valve controlling said passageways.

10. In combination a main burner, a pair of supplemental burners, a bracket at the rear of said main burner connecting said main burner with said supplemental burners, said bracket having passageways therein for connecting the main burner with the supplemental burners, valve means in said bracket for governing said passages, a ilOllS- ing for the front end of said burner, a va porizer having a tube passing through said housing, said bracket having means for supporting said vaporizer, and a nozzle for said main burner, said nozzle being connected to said vaporizer and being contained with in said housing.

In witness whereof, I hereunto subscribe my name this 16th day of December, A. D. 1916.

PHILIP D. JOHNSON.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

Washington, D. 0." 

